Design of dual-motor driving control system of belt conveyor
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摘要: 针对现有带式输送机双机驱动系统采用液力偶合器、液体黏性传动装置等驱动方法导致效率低，且难以保证双电动机速度同步、功率平衡等问题，提出了一种基于直接转矩控制策略的带式输送机双机驱动控制系统的设计方案。该系统采用一整流、两逆变组合式变频器驱动带式输送机，为主从控制方式，主机依据2台电动机额定输出功率比调整输出转矩，从而使系统可以给定转速稳定运行。仿真结果表明,该系统实现了带式输送机双机转速、转矩的同步控制，且功率平衡，具有良好的动静态性能。Abstract: In view of problems of low efficiency, difficult to guarantee speed synchronization and power balance of double-motor for that traditional dual-motor driving control system of belt conveyor adopts drive method of hydraulic coupler or liquid-viscosity driving device, a design scheme of dual-motor driving control system of belt conveyor based on direct torque control strategy was put forward. The system adopts one rectifier and two contravariant combined converter to drive the belt conveyor with master-slave control mode, and the master inverter adjusts output torque according to rated output power ratio of the two motor, so as to the system can run stably with a given speed. The simulation results show that the system realizes synchronous control of speed and torque of the double motor of belt conveyor, and implements power balance with good dynamic and static performance.
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